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K a d 0 M O m Patented Oct. 13, 1896.

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J. P. RIEPPEL. KILN FOR DECORATING PORCELAIN OR GLASS. No. 569,232.Patented Oct. 13, 1896.

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J. P. RIEPFEL. KILN FOR DECORATING PORCELAIN 0R GLASS. No. 569,232. IPatented 001;. 13, 1896.

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4 SheetsSheet 4.

(No Model.)

J. P. RIEFFEL.

KILN FOR DECORATING PORCELAIN 0R GLASS.

Patented Oct. 13, 1896.

INVENTOH J W/TNESSES. M fofiiwm. My

A TTOHNEYS.

NITED STATES PATENT OFFICE.

JOHN P. RIEFFEL, OF NEIV YORK, N. Y.

KILN FOR DECORATING PORCELAIN OR GLASS.

SPECIFICATION forming part of Letters Patent No. 569,232, dated October13, 1896.

Application filed April 18, 1893. Renewed October 30, 1895. Serial No.567,4:53. (N0 model.)

To all whom, it may concern:

Be it known that I, JOHN PHILLIP]? RIEF- FEL, a citizen of the UnitedStates, and a resident of New York city, county and State of New York,have invented certain new and useful Improvements in Kilns forDecoratingPorcelain or Glass, of which the following is a specification.

This invention has reference to an improved portable kiln for burningdecorated articles of glass and porcelain, said kiln being soconstructed that the same can be put up and used at any suitable pointwithout the least danger of fire and that the articles can be readilyobserved during the burning process and finally removed from the sameafter the burning is completed, upon which the ashes are readily removedfrom the kiln afterco0l ing, the same being then ready for receiving thenext charge and going through the next burning process.

In the accompanying drawings, Figure 1 represents a front elevation;Fig. 2, a vertical transverse section on the line 2 2, Fig. 3; Fig. 3, avertical longitudinal section on the line 3 3, Fig. 2. Fig. 4 is a planview of the movable grate and muffle-support; and Fig. 5 is a horizontalsectional view on the line 5 5, Fig. 2.

Similar letters of reference indicate corresponding parts.

The walls A of the kiln are constructed of two layers of sheet metal,between which bricks of fire-clay or any other suitable noncombustibleand non-conducting material are arranged. The top B of the kiln isconstructed in the same manner and is provided with openings B forintroducing fuel, which openings can be closed by covers B also made ofsheet metal with a filling of nonconducting and non-combustiblematerial. Each cover has a handle or rod 13'" for lifting the same onand off. Said covers are locked in closed position by bars 0, passingunder angle-clips O on the top of the kiln, through which bars screws 0are passed, which serve to press the covers B down in place. In the topof the kiln two flues D D, each having a damper D D, are arranged, theupper ends of said fines terminating in the lower end of a larger flueE, having a damper E. In the bottom of the kiln a series of cross-bars Fare arranged, between which plates F, of fireclay, are fixed, so as toform a support for the muffies, said layers of fire-brick F extending towithin a short distance from each side and end of the kiln.

Along each side of the kiln and the ends of the same two U-shapedcross-bars G are arranged, which are provided with lugs G G for guidingthem in the slots in the hollow metal base H of the kiln, saidgrate-bars G each being provided with a handle G by means of which theycan be moved in the direction of the length of the kiln. This grate cantherefore be used for shaking down the fuel and stirring the fire in thechamber surrounding the muffle. As shown in Fig. 2, said grate-bars Gare arranged a short distance below the bars F and plates F.

Below the kiln a fire-box J is formed, the sides of which are inclinedinward and downward, said fire-box having a lining J, of fireclay. Agrate K is held in the bottom opening of the fire-box and in the top ofan ashbox K, on the top edge of which ash-box the fire-box rests. Thegrate K is supported by a series of L-shaped irons M,having shanks ofdifferent length, each shank being provided on its end with an arm M.hen said L-irons M are held in the position shown in full lines in Fig.2, the grate is in the raised position and is in the bottom part of thefire-box. When said L-irons are placed in the position shown in dottedlines in Fig. 2, with the shorter shank projecting upward and the longershank horizontally, the grate is lowered to about half the height of theash-box. This change is effected by withdrawing the screw M and shiftingthe iron from one of said positions to the other. This permits of usinga greater amount of fuel, as may be necessary for some articles thatrequire a longer time for baking.

The front of the ash-box is closed by a removable cover N, which islocked in place by a bar N, the ends of which rest under angleclips N onthe end of the ash-box, said bar N being provided with screws N fordrawing it up tight. The fire-box is provided with a hinged end gate 0,that is locked in place by means of a bar 0, the ends of which restunder angle-clips O on the end of the firebox, said bar 0 having screwsO for pressing the door 0 firmlyagainst its seat. By means of the screws0 and N the doors of the firebox and ash-box can be looked very easily,so as to absolutely prevent any ingress of air during the coolingoperations.

The kiln A is closed by a removable end gate 1?, having handles P, andis locked in place by a bar Q, the ends of which rest under angle-clipsQ on the end of the kiln, said bar Q being provided with screws Q forpressing the end gate P firmly against the seat. This gate P has anopening for receiving the end of a conical extension R of the muflie R,resting on the floor formed of the bars F and the plates F, the end ofwhich conical extension R forms a peep-hole that can be closed by aswinging gate R pivoted on the outer surface of the end gate P of thekiln. The muffle R has a series of shelves S and may contain anadditional muffle T, provided with shelves T. From the top of the mufflea flue U extends into a fine II on the top of the kiln, the upper end ofsaidflue U extending into the bottom of the main flue E. A damper V isprovided in said flue U. By this arrangement of the fines and dampersthe heat can be controlled, regulated, and equalized throughout thekiln.

The kiln rests on the stand XV, made of iron bars.

The articles to be burned are placed in the mufiles and the spacebetween the muffles and the sides of the kiln is filled with charcoal,which rests on the grate-bars G. The space between the bottom of saidgrate-bars G and the bottom grate K is also filled with charcoal and thefire, is started. After the muffles have been heated to the desireddegree all openings are carefully closed, so as to prevent any air fromentering the kiln while the same and the articles therein are cooling.The draft in any part of the kiln can easily be regulated by means ofthe dampers described, and the fuel can easily be placed in the furnaceand the ashes removed through the several openings above described.

As all the parts of my improved kiln are made of materials that canresist the fire in a high degree and by which the radiation of heat isprevented, nearly the full heat is utilized in the burning process, sothata perfect and effective burning of the article is obtained. The kilnis portable and can be put up at any floor of a building, withoutrequiring to be walled up and made a permanent structure. It is ofspecial advantage for all those trades which decorate small articles ofglass and porcelain with colored enamels that are fixed onto the goodsby burning.

' Having thus described my invention, I claim as new and desire tosecure by Letters Patent 1. In a portable kiln, the combination of afire-box, a casing above the fire-box, amuflie supported in said casing,a fuel chamber around said mniile within said casin g, and anoscillatory grate between said fire-box and fuel-chamber.

2. In a portable kiln, the combination of a fire-box, a casing above thefire-box, bars extending across the bottom of said casing, heatabsorbing and radiating plates disposed between said bars and forming acentral floor, a muffle supported on said floor, and a fuelchamberaround said muffle within said casing.

3. A kiln for burning articles of glass or porcelain composed of abase-frame, transverse bars, plates between said bars, amuflie supportedon said bars and plates, a casing on the base-frame and surrounding themuffle, and U -shaped sliding grate-bars below the muffle and itssupport for supporting the fuel between the walls of the muffle and theeasing, substantially as set forth.

4:. In a portable kiln, the combination of a fire-box, a casing abovethe fire-box, anouter muflle in the casing, an interior muffle in thelower part of the outer muffle, the upper part of said outer mufflebeing fitted with removable shelves, and a fuel-chamber around saidouter mufile within said casing, substantially as set forth.

5. In a portable kiln, the combination of a fire-box, a casing above thefire-box, two damper-equipped flues extending from the top of the casingand merging into an enlarged main flue, a muffle in said casing, aconical flue extending from said muffie through the top of the casing, adamper-equipped conical fine of larger diameter than the top of saidmuffleflue, mounted on said casing, and surrounding said muffle-flue,said casing-flue extendlng into the enlarged main flue at a pointbetween the converging flues, and a damper in the enlarged main flue,substantially as set' forth.

In testimony that I claim the foregoing as my invention I have signed myname in presence of two subscribing witnesses.

JOHN P. RIEFFEL.

YVitnesses:

OSCAR F. GUNZ, CHARLES SOHROEDER.

